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Twin-shaft shredder blades, single-shaft square inserts, and shear knives supplier

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Your Trusted Heavy-Duty Industrial Shredder Blades Supplier

As a leading global shredder blade supplier, we produce high‑quality replacement knives for recycling use. Our factory manufactures heavy‑duty single‑shaft, twin‑shaft shredder blades to meet your specific requirements. Crafted from D2 and H13 alloy steel, all blades undergo precision vacuum heat treatment to achieve stable 50‑58 HRC hardness with no internal defects. We provide factory‑direct wholesale prices, quick delivery and OEM services for common recycling machine brands.

Payment Terms:
L/C, T/T, Paypal, Money Gram
Min. Order:
10

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Shredder Blades Suppliers FAQ

Q1: Are you a direct factory or trading company?

A: We are a professional shredder blade manufacturer with our own factory, CNC machining, heat‑treatment workshop, and quality inspection lab. No middlemen, factory direct supply with stable quality and competitive prices.

Q2: How many years have you produced shredder blades?

A: More than 15 years of experience in manufacturing single‑shaft, twin‑shaft shredder blades, granulator knives and shear blades for recycling, waste disposal and metal processing industries.

Q3: What steel grades do you use for shredder blades?

A: Main materials include D2, Cr12MoV, H13, DC53, SKD11, 9CrSi, and carbide‑tipped blades for heavy‑duty metal shredding. We select materials according to your shredding materials (plastic, wood, rubber, tire, scrap metal, household waste).

Q4: What is the hardness of your shredder blades?

A: Conventional hardness HRC 50‑62. Vacuum quenching + tempering + cryogenic treatment ensures high wear resistance and good toughness to avoid chipping or breaking easily.

Q5: Can blades be resharpened/repaired after wear?

A: Yes. Our blades can be re‑ground multiple times, greatly reducing long‑term replacement costs.

Q6: Which shredder machine brands do your blades fit?

A: Compatible with Lindner, Hammel, Mewa, CM, Genox, Forrec, Eldan, 3E and most Chinese domestic shredder models. Custom sizes for non‑standard machines are available.

Q7: Can you make custom shredder blades with our drawings/samples?

A: Yes. We support full customization based on your drawings, samples, dimensions, hole positions, edge angles and special requirements.

Q8: What is your minimum order quantity (MOQ)?

A: MOQ is 10 pieces for standard models. Small trial orders are accepted for new customers.

Q9: Can you provide samples for quality testing?

A: Yes. Sample blades are available; customers bear the freight cost.

Q10: What is your production lead time?

A: Standard blades: 10‑15 working days. Custom blades: 15‑25 working days. Bulk orders are negotiable.

Q11: What payment terms do you accept?

A: T/T, L/C, Western Union, PayPal. 30% deposit before production, balance before shipment.

Q12: How do you pack the blades?

A: Standard export wooden cases or plywood cases with rust‑proof oil, suitable for sea freight and long‑distance transport.

Q13: What is your warranty policy?

A: We offer quality warranty against manufacturing defects. If blades chip or crack under normal working conditions due to material or production problems, we provide free replacement.

Q14: What after‑sales service do you provide?

A: We offer technical support for blade installation, gap adjustment and maintenance. Online guidance and overseas after‑sales consultation are available.

Q15: Why do your blades have longer service life than other suppliers?

A: Strict raw material inspection, precision CNC machining, professional vacuum heat‑treatment process and strict quality control for every piece ensure stable performance and longer working life.

Q16: Which blade should I choose for my materials?

- Plastic / wood / paper waste: D2, Cr12MoV - Tire / rubber: DC53, H13 (high toughness) - Scrap metal / heavy‑duty waste: H13, carbide‑tipped blades We provide free material‑matching suggestions.

Q17: How often should shredder blades be replaced?

A: Depends on daily output, material hardness and working hours. Generally 1‑6 months under normal use. Proper maintenance extends service life.

Q18: Do you supply other shredder spare parts?

A: Yes, including knife shafts, blade sleeves, spacers, shredder hammers and wear‑resistant plates.

Q19: Can you provide OEM/ODM service with our brand?

A: Yes, OEM marking, logo engraving and private‑label packaging are supported.

Comprehensive Guide to Industrial Shredder Blades: Selection, Performance and Customization

Maximize Efficiency with Top Shredder Blades Suppliers

For heavy-duty recycling, your machine’s cutting system is key.
Good shredder blades (single-shaft, double-shaft, rotary inserts) from reliable manufacturers cut maintenance costs and downtime.
Each blade type fits specific machines and materials.
Pick the right material to boost performance, make blades last longer, and save money.
Top suppliers can help you pick the best blades.

Material Science: Chemicals & Performance

Shredder blade performance depends on its chemical makeup.
Different materials work for different needs. They affect hardness, toughness, wear resistance, and impact resistance.
Below is a simple breakdown of core blade materials (important for working with a custom blade factory).

Single Shaft Blades & Rotary Inserts: Core Materials (D2 & DC53)

Single-shaft blades (square/round inserts) need high precision for even output.
They cut and press materials against a fixed anvil.
Rotary inserts are replaceable (common OEM parts) and use D2/DC53 for consistent results.
Their modular design lets you replace them quickly to keep operations running.

D2 Tool Steel

Chemical Composition: C 1.40-1.60%, Cr 11.00-13.00%, Mo 0.80-1.20%, V 0.20-0.50%, Mn ≤0.60%, Si ≤0.40%
Performance: Sharp and wear-resistant. Good for plastic, wood, and light metal scraps.
Heat treatment (58-62 HRC) keeps it sharp longer, so you sharpen less often.

DC53 Tool Steel

Chemical Composition: C 1.00-1.10%, Cr 8.00-10.00%, Mo 2.00-2.50%, V 0.80-1.20%, Mn ≤0.50%, Si ≤0.40%
Performance: 2-3 times tougher than D2. Resists cracking (good for thick plastic, small electronic scrap).
Stays sharp (58-62 HRC) and won’t deform.

Double Shaft Knives: Core Materials (9CrSi, Cr12MoV & H13)

Double-shaft knives have a claw-like, interlocking design (core wholesale parts).
They work well, make little heat, and handle high impact and wear.
Below are material suggestions for different uses.

9CrSi Alloy Tool Steel

Chemical Composition: C 0.85-0.95%, Cr 1.20-1.50%, Si 1.00-1.30%, Mn ≤0.40%
Performance: Hard (56-60 HRC), wear-resistant, and low-cost.
Good for soft materials (rubber, paper, thin plastic) — a popular wholesale part.

Cr12MoV Cold Work Tool Steel

Chemical Composition: C 1.45-1.70%, Cr 11.00-12.50%, Mo 0.40-0.60%, V 0.15-0.30%, Mn ≤0.40%, Si ≤0.40%
Performance: Hard (58-62 HRC), very wear/impact-resistant, and barely deforms.
Good for medium-hard materials (wood, hard plastic, metal scraps, tires).

H13 Hot Work Tool Steel

Chemical Composition: C 0.32-0.45%, Cr 4.75-5.50%, Mo 1.10-1.75%, V 0.80-1.20%, Si 0.80-1.20%, Mn 0.20-0.50%
Performance: Hard (52-58 HRC). Balances wear, impact, and heat resistance.
Good for high-load, non-stop industrial waste processing.

High Manganese Steel (Complementary)

Chemical Composition: C 1.00-1.40%, Mn 11.00-14.00%
Performance: Tough and impact-resistant. Its surface hardens with use.
Good for municipal/construction waste (sandy, impure).
Pair with H13 for mixed waste — included in wholesale bundles.

Key Differences: Single-Shaft vs. Double-Shaft Blades

Single-Shaft Shredder Blades

For single-shaft machines. Fixed or replaceable inserts (works with OEM parts).
Made from D2/DC53 — precise and sharp.
Good for even, medium-hard materials.
Manufacturers offer multiple sizes and custom options.

Double-Shaft Shredder Knives

For double-shaft machines. Claw-like, interlocking design (core wholesale parts).
Made from 9CrSi, Cr12MoV, or H13.
Cuts/tears irregular, high-impact, hard waste (metal scraps, construction waste).
Staggered layout prevents jamming and increases output.

Precision Heat Treatment: Extend Blade Life

Heat treatment determines how long blades last and how well they work (a top priority for suppliers).

Single-Shaft Blades & Rotary Inserts (D2/DC53)

Advanced vacuum heat treatment (58-62 HRC) keeps blades sharp longer.
Reduces how often you replace blades and saves money.

Double-Shaft Knives

Vacuum quenching is tailored to each material (balances hardness and toughness).
Hardness levels:

9CrSi: 56-60 HRC
Cr12MoV: 58-62 HRC
H13: 52-55 HRC

Customization: Choose a Trusted Custom Metal Shredder Blade Factory

Blade shape, thickness, and material matter for special waste (medical, bulky wood, dangerous plastic, metal scraps).
A professional custom factory will make blades that fit your needs.

Single-Shaft Blades/Rotary Inserts

Choose material (D2/DC53), thickness, and insert shape (matches your machine and materials).
Available as OEM replacement parts.

Double-Shaft Knives

Choose claw type (2/3/8-claw), thickness (10-75mm), and material (9CrSi/Cr12MoV/H13).
This sets output size and cutting speed (key for wholesale parts).

How to Choose the Right Shredder Blades

Wrong blades cause frequent downtime and high maintenance costs.
Use this simple guide from manufacturers.

ALAS Manufacturing: Your Reliable Shredder Blades Supplier

We are a trusted manufacturer and custom factory.
Our blades use quality materials, precise chemistry, and advanced heat treatment.

Our Blade Offerings

Single-shaft blades: D2/DC53 + vacuum heat treatment (58-62 HRC), sharp and tough.
Available as OEM parts for major brands.
Double-shaft knives: 9CrSi/Cr12MoV/H13 (matched to your waste) — core wholesale parts.
CNC machining ensures a perfect fit for hex/square shafts (reduces vibration, extends gearbox life).
Optimized rotary inserts fit your machine seamlessly.

Custom Solutions: OEM & Wholesale Options

OEM replacement parts for major brands (Vecoplan, Weima, Lindner, SSI) — all blade types.

Customizations Beyond Standard Sizes

Single-shaft: Choose insert shape (square/round), thickness, and D2/DC53 grade (matches torque and material density).
Available as OEM parts.
Double-shaft: Choose tooth shape, claw number, and material (9CrSi/Cr12MoV/H13) — sets particle size (key for wholesale parts).

Conclusion: Choose High-Grade Blades from Trusted Suppliers

Poor-quality blades slow your business and cost more.
Invest in high-grade blades:

Single-shaft: D2/DC53
Double-shaft: 9CrSi/Cr12MoV/H13
Rotary inserts

ALAS offers wholesale parts, OEM replacements, and custom solutions.
Contact us with your blade size, machine type, or material needs for a custom quote!

Double Shaft Shredder Blades: Detailed Overview

Double-shaft blades are key recycling parts (core wholesale parts).
They work with single-shaft blades and OEM rotary inserts.
Their wear/impact resistance (9CrSi/Cr12MoV/H13) affects efficiency, output, energy use, and maintenance costs.
They crush materials by meshing, cutting, and tearing with two counter-rotating shafts.
Unlike single-shaft machines, they handle hard-to-process materials (metal, plastic, construction/household waste).
Choose wear-resistant blades from a reliable factory to save time and money.

Core Working Principle & Structure

Claw-Type Design & How It Works

Two counter-rotating shafts with spiral, staggered claw blades (9CrSi/Cr12MoV/H13) — core wholesale parts.
Forms a meshing chamber: grabs materials fast (no slipping/jamming).
Powerful torque (cutting + tearing) breaks down large/irregular materials into even pieces.
Works at low speed (5.5–10 rpm), high torque (Cr12MoV = wear-resistant; H13 = tough).
Staggered blades: constant cutting (more efficient), stable operation (H13 resists deformation).

Structure Advantages: Strength & Easy Maintenance

Customizable Claws & Thickness

2/3/6/8/12 claws (more = finer output).
10-75mm thickness (thicker = better impact resistance).
Pair thick blades with Cr12MoV/H13 for hard materials (custom option from manufacturers).

Modular Quick-Change Design

“Blade body + clawed blade + auxiliary blade” structure.
Replace worn parts with bolts (less downtime).
Works with rotary inserts (OEM parts).

Better Torque Transmission

Spline/hexagonal shafts with perfect blade holes (even force distribution).
Prevents cracking (H13/Cr12MoV toughness) and spindle deformation.
Good for non-stop high-load use (key benefit of ALAS wholesale parts).

Applicable Materials, Performance & Maintenance

Double-shaft knives (9CrSi/Cr12MoV/H13) work with single-shaft blades (D2/DC53) and OEM rotary inserts.
They fit all recycling needs.

Applicable Materials

Metals: Cr12MoV/H13 (aluminum cans, car shells, scrap steel); D2/DC53 rotary inserts (smaller metal pieces).
Synthetic Materials: 9CrSi/Cr12MoV (large PE/PP films, plastic barrels, electronic casings); D2 rotary inserts (precise shredding).
Construction/Mixed Waste: High-manganese steel/H13 (renovation/bulky waste); D2 blades (secondary shredding).
Organic Materials: D2/DC53 blades/rotary inserts (furniture, branches); 9CrSi double-shaft blades (bulky pieces).
Special Industrial Materials: Reinforced Cr12MoV (whole tires); H13 (mixed industrial waste); rotary inserts (quick maintenance).

Core Performance Traits

Long Wear Life: Cr12MoV/H13 blades (4 sharpenings, 4 rotatable edges) — same as D2/DC53 blades. Cuts replacement costs.
Stable Operation: PLC control, overload reversal, sealed bearings, high-manganese liners. Low noise (<85dB), low dust, 24-hour use.
Efficient & Energy-Saving: Blade structure + variable frequency drive. Cuts energy use by 15-30%.

Maintenance Tips

Regular Sharpening: Sharpen worn blades (max 4 times for Cr12MoV/H13 and D2/DC53) — makes them last longer.
Adjust Gaps: Check and adjust blade gaps often (too big = low efficiency) — important for all blades.
Replace Parts Timely: Replace chipped/cracked blades (prevents equipment breakdown).
Daily Bolt Checks: Tighten fixing bolts before/after use (prevents loosening) — works for all blades.

Key Tips for Choosing & Buying Shredder Blades

Match Material Precisely

Single-shaft/rotary inserts: D2 (sharpness) or DC53 (toughness) for medium-hard materials (plastic, wood, light metal).
Double-shaft knives: Cr12MoV (hard materials); H13/high-manganese steel (high-impact/impure waste); 9CrSi (soft materials).

Choose the Right Structure

Single-shaft machines: Use rotary inserts (OEM parts) — easy to replace, less downtime.
Double-shaft machines: Modular quick-change design, hexagonal shafts. 8/12 claws (fine output); 2/3 claws (coarse crushing). Thick blades + Cr12MoV/H13 (hard materials).

Choose Cost-Effective Options: For urban waste recycling — high-manganese steel double-shaft blades (wholesale parts), D2 rotary inserts (OEM parts), variable frequency drive. Balances impact/wear resistance and energy savings.
Provide Custom Details: Share machine model, shaft diameter, installation size, material type (hardness/impurities), output size with your supplier. Needed for tailored solutions.